Tool.



S. C. SCANTLEBURY.

TOOL.

APPLICATION FILED DBG.17, 1913.

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Mam/tow CO1 UMBIA PLANOGRAPH CD.. WASHINGTON. D4 c.

Patented May 12, 1914.

S. C. SCANTLEBURY.

TOOL.

APPLICATION FILED DEC. 17, 1913 Patented M 2 SHEET ET 2.

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UNITED STATES PATENT @FFIQE.

SPURGEON G. SCANTLEBURY, 0F SPOKANE, WASHINGTON.

TOOL.

To all whom it may concern Be it known that I, Srunonon C. SCANTLE-BURY, a citizen of the United States, residing in Spokane, in the countyof Spokane and State of lVashington, have invented new and usefulImprovements in Tools, of which the following is a specification.

The object of this invention is to provide a tool for expanding a springover the head of a screw stud of eye-glasses so as to avoid thenecessity of unriveting and removing the screw stud in order to positiona spring thereon.

The device of my invention includes a spring expander with meanscooperating therewith to effect sufficient expansion of the spring toposition the same upon the shank of the screw stud beyond the headthereof.

In the most improved embodiment of my invention, I employ means of aresilient nature for clasping the spring expander in a manner to engagethe spring so as to prevent rupture thereof when the spring is beingexpanded so as to be slipped over the head of the screw stud.

Other objects and features of the invention will be more fully describedin connection with the accompanying drawing, and will be moreparticularly pointed out and ascertained in and by the appended claims.

In the drawing: Figure 1 is a. view in elevation, illustrative of oneform of my invention, showing the operation of expanding a spring withthe glasses omitted. Fig. 2 is a view in elevation, showing the mannerof applying a spring to the screw stud of a pair of eye-glasses. Fig. 3is an inner face view of one of the jaws of a pair of pliers. Fig. at isa sectional view thereof on line 1 l of Fig. 3. Fig. 5 is a sectionalview on line 55 of Fig. 8. Fig. 6 is a sectional view through parts ofeye-glasses, which are united by a screw stud, the view being drawn onan enlarged scale.

Like characters of reference designate similar parts throughout thedifferent figures of the drawing.

As illustrated, 1 designates a holder which may be in the form of a jawof a pair of pliers. A supporting base is indicated at 2, which may takethe form of a companion jaw of the pliers.

lVhen the invention is in the form of a pair of pliers, the jaws arepivotally connected at 3 and are provided with handles Specification ofLetters Patent.

Application filed December 17, 1913.

Serial No. 807,186.

4: and 5, whereby the aws may be manually operated.

The holder aw 1 is provided with a holder portion in the form of aguiding aperture 6, and the supporting jaw 2 may be provided with asupporting stud 7, which may be hollowed out for more effectiveengagement with the convex riveted end of the screw stud 8. I employ acoiled spring expander, which I have shown in the form of a taperedmandrel 9, which is proportioned for passage in and through the guidingportion or aperture 6 of the holder or jaw 1.

In the most preferred embodiment of my invention, I employ a grasper fortightly embracing the mandrel and engaging the spring to advance thesame toward the larger end thereof, and I have provided an improvedgrasper adapted to snugly embrace the mandrel when advanced along itsenlarging cross section so as to prevent the delicate coils of thespring from becoming wedged between and disrupted by engagement betweenthe mandrel and the wall of the guiding aperture 6.

My improved grasper, as shown, consists of a flat strip of resilientmetal, as indicated at 10. The grasper strip is provided with anaperture 11, which is adapted to register, axially, with the guidingaperture 6 and which is normally of considerably reduced diameter withrespect thereto. The diameter of the opening 11 is preferably equal to,but may be slightly reduced with respect to, the diameter of the smallerend of the mandrel so as to ust permit of starting insertion of themandrel therethrough. I split the grasper strip 10 longitudinallythereof, as indicated at 12, and in order to increase itsspringvactio-n, I may reduce the strip 10 at its split juncture, asindicated at 13, for a portion of the length thereof. In order to retainthe mandrel grasper on the holder or jaw 1, I provide the latter with ascrew stud let, which may be of polygonal cross section at 15, where itpasses through an opening 16 in the grasper. The stud 14 is providedwith a head 17 engaging the lower face of the grasper to hold the samein position. The polygonal portion of the stud 14 will serve to maintaintheopening 11 against displacement, laterally, from registry with theopening 6.

When the device of my invention is employed in connection with pliers ofa type Patented May 12, 1914.

wherein the jaws are not parallel, I prefer to elongate the opening 16so as to provide for longitudinal. movement of the grasper strip alongthe holder jaw 1 to accommodate for dilferential movement during closureof diverging jaws. I also preferably bow the QITEXSPQT strip, as clearlyindicated at 18 in Fig. 4:, so as to retain the apertured end in firmengagement with the apertured end of the holder jaw 1.

My invention also includes a mandrel catcher which is shown in the formof a tube 19 held in position to register with opening 6, so that whenthe spring has been expanded and the mandrel has been released, themandrel will be held between the resultantly contracted split ends ofthe strip 10 inside of the catching device 19. I have herein shown thecatching device 19 mounted upon a support 20, which is shown pivoted at21 to the jaw 1.

In Fig. 6 I have shown an enlarged seetional view through the partsunited by the screw stud and the reduced shank of the latter isindicated at 22. The threaded end 8 is riveted or upset over the bridgeshank 23 and interposed between the shoulder 2 1 and the bridge shank 23is the collet 25 and the swinging guard 26. The head of the screw studis indicated at 27 and the coiled spring 28 is expanded over the head 27onto the enlarged shank portion 29 so that the coils 28 will beinterposed between the collet 25 and the head 27.

Describing the device of my invention when embodied in a pair of handpliers, the spring 28 will first be disposed over the smaller end of themandrel 9 and slightly advanced thereon to the position shown in Fig. 1.The mandrel 9, or rather the smaller end thereof, will then be insertedthrough the opening 11 into a position to bring the upper convolution orwind of the spring into engagement with the grasper. The grasper will beslightly expanded by in sertion of the mandrel therethrough, so that thesplit portions of the grasper will snugly fit a out the peripheries ofthe mandrel and engage the spring so as to advance the same andpositively prevent the upper wind of the spring from being crowdedbetween the mandrel and the grasper. In some cases, I may oval theopening 11 in order to obtain a maximum accuracy of fit throughoutengagement of the grasper with the gradually increasing cross section ofthe mandrel. The pliers are then opened to permit of the convexlyrounded riveted end 8 being seated in the preferably eoncaved upper faceof the base cap 7, the head 27 being disposed beneath the larger end ofthe mandrel 9, and the latter being preferably concaved to facilitatemaintenance of engagement in the disposition shown in Fig. 2. The jawsare then gradually closed from the position shown in Fig. l to theposition shown in Fig. 2 and the spring 28 is expanded as it is advancedalong the increasing cross section of the mandrel. The larger end of theman drel is so proportioned with respect to the head 27 that the springwill be forced over the head 27 when the aws reach a final clos ingposition. The concavity in the larger end of the mandrel is preferablyof a greater radius than that of the head 27, so that a final impulse ina closing direction on the iandles 4c and 5 will serve to force thelarger end of the mandrel up through the now extended split end of thestrip 10 and contraction of the latter will snap the mandrel into thecatching device into which the mandrel has been gradually projectedduring closing movement of the aws. Thus the mandrel will. be supportedupon the abutting splitends of the strip 10, so as to be supportedthereby in the catching device and be retained therein until again used.lVhen itis desired to again use the mandrel and tool, the former may bereleased from the catching device 19 by simply swinging the samebackwardly on the pivot 21.

Expansion of the spring over the enlarged end of the mandrel will reducethe number of winds and enlarge the spring so that it will fit looselyabout the screw stud. By grasping the opposite end of the spring andcontracting the same, the number of winds will be increased. to normaland the spring will be ready for location of its free ends in operativerelation with the parts to be actuated thereby.

l'IGl'GlLOfOIG it has been necessary to file oil the riveted end of thescrew stud and remove the latter in order to apply a new spring, and asit is usually necessary to perform this operation while the customer iswaiting, and as it is not only a trying but ditlicult piece of work todo, it has heretofore been greatly dreaded even by the most skilfuloperators. By employing the device of my invention, this fussy and inconvenient detail. of work is greatly facilitated and the risk of rupturingthe delicate structure of the glasses frame is entirely avoided.

It is believed that the advantages and utility of my invention will. beclearly understood from the foregoing description, and while I haveherein shown and described one specific embodiment of my invention, I donot wish to be limited thereto except for such limitation as the claimsmay import.

I claim 1. As a means for expanding a coil spring over the head of aneye-glass stud screw, means for supporting the stud screw, a taperedmandrel for expanding the spring and adapted for engagement of itslarger end upon said head, an apertured holder for retaining saidmandrel in position and adapted to be advanced therealong toward saidhead, and expansible means interposed between the spring and said holderfor gripping the mandrel throughout its move ment therealong,substantially as described.

2. As a means for expanding a coil spring over the head of an eye-glassstud screw, a tapered mandrel for expanding the spring and adapted forengagement of its larger end with said head, expansible means grippingsaid mandrel and engaging said spring to advance the same along saidmandrel and over said head, a holder for advancing said means onto saidhead to finally raise the mandrel out of grip and permit contraction ofsaid expansible means to flip the mandrel away therefrom, and means forcatching the mandrel, substantially as clescribed.

3. As a means for expanding a coil spring over the head of an eye-glassstud screw, pliers provided with jaws and one thereof being adapted forengagement with the end of said screw, the remaining jaw beingapertured, a tapered mandrel for expanding the spring and adapted to bepartially inserted in the aperture of said jaw to hold its larger endupon the head of said screw, and an expansible means carried by saidapertured jaw for gripping the mandrel and advancing the springtherealong upon contraction or closing movement of said jaws,substantially as described.

at. As a means for expanding a coil spring over the head of an eye-glassstud screw, pliers having one jaw adapted for supporting engagement withone end of said'screw, the remaining jaw having a guiding aperture, atapered mandrel for expanding the spring adapted to be projected intothe aperture of said jaw with its larger end rest ing on said head, anda split spring plate carried by said apertured jaw and having an openingfor grasping the mandrel to advance the spring therealong upon closingmovement of said jaws, substantially as described.

5. As a means for expanding a coil spring over the head of an eye-glassstud screw, pliers having one jaw adapted for supporting engagement withthe end of said screw, a tapered mandrel for expanding the spring, theremaining jaw being provided with a guiding portion for engagement withthe mandrel and with the spring to advance the latter along the formerand over the head of said screw, and a tubular mandrel catching devicepivotally mounted on said apertured jaw for receiving the mandrel,substantially as described.

6. As a means for expanding a coil spring over the head of an eye-glassstud screw, pliers having one jaw adapted for supporting engagement withone end of said screw, the remaining jaw having a guiding aperture, a.tapered mandrel for expanding the spring adapted to be projected intothe aperture of said jaw with its larger end resting on said head, and asplit spring plate slidably carried by said apertured jaw and having anopening for grasping the mandrel to advance the spring therealong uponclosing movement of said jaws, substantially as described. 7

7. In a device for expanding a coil spring over the head of an eye-glassstud screw, a tapering spring expanding mandrel for the spring,mechanism comprising a base portion for supporting the screw stud at oneend and a holder movable along the mandrel and engaging the larger endof the mandrel with the head end of the stud screw to firmly hold thesame and advance the spring along the mandrel over the larger end of thelatter and over the head of the stud screw, and means interposed betweenthe spring and the holder for preventing rupture of the former by thelatter, substantially as described.

8. In a device for expanding a coil spring over the head of an eye-glassstud screw, a tapering spring expanding mandrel for holding the spring,a base portion for supporting the screw stud at one end, a holdermovable along the mandrel and engaging the larger end of the mandrelwith the head end of the stud screw to firmly hold the same and advancethe spring along the mandrel over the larger end of the latter and overthe head of the stud screw, and means carried by the holder and disposedbetween the latter and the spring for gripping the mandrel to preventrupture of the spring coils by the holder, substantially as described.

9. In a device for expanding a. coil spring over the head of an eyeglassstud screw, mechanism including a tapering spring expanding mandrel forholding the stud screw firmly in position and advancing the spring alongthe mandrel over the head of the stud screw, and means interposedbetween the spring and a portion of said mechanism for preventingrupture of the spring, substantially as described.

10. In a device for expanding a coil spring over the head of aneye-glass stud screw, mechanism including a. spring expander for holdingthe stud screw firmly in position and advancing the spring along themandrel and over the head of the stud screw, and spring means grippingthe expander and actuated by said mechanism for direct engagement withthe spring to prevent rupture of the latter by said mechanism,substantially as described.

11. As a means for expanding a coil spring over the head of an eye-glassstud screw, pliers provided with jaws and one thereof being adapted forengagement with the end of said screw, the remaining jaw being andbetween said spring and said apertured apertured, a tapering mandrel forexpand jaw, substantially as described.

ing the spring and adapted to be partially In testimony that I claim theforegoing inserted in the aperture of said jaw to hold as my own, Ihereby affix my signature in the its larger end upon the head of saidscrew, presence of two subscribing witnesses.

a split leaf spring adjustably carried by r -r* r said apertured jaw andbeing bowed be- SI URGEON SCALlLEBURl' tween its ends away from saidapertured Witnesses: jaw and having an aperture in its split HAROLDSCANTLEBURY,

10 portion for movement along the mandrel EDNA BROYLES.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Eatents, Washington, D. G.

